tool "draw" not found for space "VIEW-3D
Solving this issue (not exactly an issue) in Blender 2.80 is actually very simple.

Before opening the Sculpting tab, go to Layout tab and be sure that in the Outliner, the reverse triangle icon on the left side of your object name, is highlighted. It should be gray in dark theme.

If not, simply click on it and select your object. Then open Sculpting tab and everything will be fine.